/*
 * jQuery Tools 1.2.3 Tooltip - UI essentials
 *
 * Copyright (c) 2009 Tero Piirainen
 * http://flowplayer.org/tools/
 *
 * Dual licensed under MIT and GPL 2+ licenses
 * http://www.opensource.org/licenses
 *
 */
(function($) {

	/*
		removed: oneInstance, lazy,
		tip must next to the trigger
		isShown(fully), layout, tipClass, layout
	*/

	// static constructs
	$.tools = $.tools || {version: '1.2.3'};

	$.tools.tooltip = {

		conf: {

			// default effect variables
			effect: 'toggle',
			fadeOutSpeed: "fast",
			predelay: 0,
			delay: 30,
			opacity: 1,
			tip: 0,

			// 'top', 'bottom', 'right', 'left', 'center'
			position: ['top', 'center'],
			offset: [0, 0],
			relative: false,
			cancelDefault: true,

			// type to event mapping
			events: {
				def: 			"mouseenter,mouseleave",
				input: 		"focus,blur",
				widget:		"focus mouseenter,blur mouseleave",
				tooltip:		"mouseenter,mouseleave"
			},

			// 1.2
			layout: '<div/>',
			tipClass: 'tooltip'
		},

		addEffect: function(name, loadFn, hideFn) {
			effects[name] = [loadFn, hideFn];
		}
	};


	var effects = {
		toggle: [
			function(done) {
				var conf = this.getConf(), tip = this.getTip(), o = conf.opacity;
				if (o < 1) { tip.css({opacity: o}); }
				tip.show();
				done.call();
			},

			function(done) {
				this.getTip().hide();
				done.call();
			}
		],

		fade: [
			function(done) {
				var conf = this.getConf();
				this.getTip().fadeTo(conf.fadeInSpeed, conf.opacity, done);
			},
			function(done) {
				this.getTip().fadeOut(this.getConf().fadeOutSpeed, done);
			}
		]
	};


	/* calculate tip position relative to the trigger */
	function getPosition(trigger, tip, conf) {


		// get origin top/left position
		var top = conf.relative ? trigger.position().top : trigger.offset().top,
			 left = conf.relative ? trigger.position().left : trigger.offset().left,
			 pos = conf.position[0];

		top  -= tip.outerHeight() - conf.offset[0];
		left += trigger.outerWidth() + conf.offset[1];

		// adjust Y
		var height = tip.outerHeight() + trigger.outerHeight();
		if (pos == 'center') 	{ top += height / 2; }
		if (pos == 'bottom') 	{ top += height; }

		// adjust X
		pos = conf.position[1];
		var width = tip.outerWidth() + trigger.outerWidth();
		if (pos == 'center') 	{ left -= width / 2; }
		if (pos == 'left')   	{ left -= width; }

		return {top: top, left: left};
	}



	function Tooltip(trigger, conf) {

		var self = this,
			 fire = trigger.add(self),
			 tip,
			 timer = 0,
			 pretimer = 0,
			 title = trigger.attr("title"),
			 effect = effects[conf.effect],
			 shown,

			 // get show/hide configuration
			 isInput = trigger.is(":input"),
			 isWidget = isInput && trigger.is(":checkbox, :radio, select, :button, :submit"),
			 type = trigger.attr("type"),
			 evt = conf.events[type] || conf.events[isInput ? (isWidget ? 'widget' : 'input') : 'def'];


		// check that configuration is sane
		if (!effect) { throw "Nonexistent effect \"" + conf.effect + "\""; }

		evt = evt.split(/,\s*/);
		if (evt.length != 2) { throw "Tooltip: bad events configuration for " + type; }


		// trigger --> show
		trigger.bind(evt[0], function(e) {
			clearTimeout(timer);
			if (conf.predelay) {
				pretimer = setTimeout(function() { self.show(e); }, conf.predelay);

			} else {
				self.show(e);
			}

		// trigger --> hide
		}).bind(evt[1], function(e)  {
			clearTimeout(pretimer);
			if (conf.delay)  {
				timer = setTimeout(function() { self.hide(e); }, conf.delay);

			} else {
				self.hide(e);
			}

		});


		// remove default title
		if (title && conf.cancelDefault) {
			trigger.removeAttr("title");
			trigger.data("title", title);
		}

		$.extend(self, {

			show: function(e) {

				// tip not initialized yet
				if (!tip) {

					// autogenerated tooltip
					if (title) {
						tip = $(conf.layout).addClass(conf.tipClass).appendTo(document.body)
							.hide().append(title);

					// single tip element for all
					} else if (conf.tip) {
						tip = $(conf.tip).eq(0);

					// manual tooltip
					} else {
						tip = trigger.next();
						if (!tip.length) { tip = trigger.parent().next(); }
					}

					if (!tip.length) { throw "Cannot find tooltip for " + trigger;	}
				}

			 	if (self.isShown()) { return self; }

			 	// stop previous animation
			 	tip.stop(true, true);

				// get position
				var pos = getPosition(trigger, tip, conf);


				// onBeforeShow
				e = e || $.Event();
				e.type = "onBeforeShow";
				fire.trigger(e, [pos]);
				if (e.isDefaultPrevented()) { return self; }


				// onBeforeShow may have altered the configuration
				pos = getPosition(trigger, tip, conf);

				// set position
				tip.css({position:'absolute', top: pos.top, left: pos.left});

				shown = true;

				// invoke effect
				effect[0].call(self, function() {
					e.type = "onShow";
					shown = 'full';
					fire.trigger(e);
				});


				// tooltip events
				var event = conf.events.tooltip.split(/,\s*/);

				tip.bind(event[0], function() {
					clearTimeout(timer);
					clearTimeout(pretimer);
				});

				if (event[1] && !trigger.is("input:not(:checkbox, :radio), textarea")) {
					tip.bind(event[1], function(e) {

						// being moved to the trigger element
						if (e.relatedTarget != trigger[0]) {
							trigger.trigger(evt[1].split(" ")[0]);
						}
					});
				}

				return self;
			},

			hide: function(e) {

				if (!tip || !self.isShown()) { return self; }

				// onBeforeHide
				e = e || $.Event();
				e.type = "onBeforeHide";
				fire.trigger(e);
				if (e.isDefaultPrevented()) { return; }

				shown = false;

				effects[conf.effect][1].call(self, function() {
					e.type = "onHide";
					shown = false;
					fire.trigger(e);
				});

				return self;
			},

			isShown: function(fully) {
				return fully ? shown == 'full' : shown;
			},

			getConf: function() {
				return conf;
			},

			getTip: function() {
				return tip;
			},

			getTrigger: function() {
				return trigger;
			}

		});

		// callbacks
		$.each("onHide,onBeforeShow,onShow,onBeforeHide".split(","), function(i, name) {

			// configuration
			if ($.isFunction(conf[name])) {
				$(self).bind(name, conf[name]);
			}

			// API
			self[name] = function(fn) {
				$(self).bind(name, fn);
				return self;
			};
		});

	}


	// jQuery plugin implementation
	$.fn.tooltip = function(conf) {

		// return existing instance
		var api = this.data("tooltip");
		if (api) { return api; }

		conf = $.extend(true, {}, $.tools.tooltip.conf, conf);

		// position can also be given as string
		if (typeof conf.position == 'string') {
			conf.position = conf.position.split(/,?\s/);
		}

		// install tooltip for each entry in jQuery object
		this.each(function() {
			api = new Tooltip($(this), conf);
			$(this).data("tooltip", api);
		});

		return conf.api ? api: this;
	};

}) (jQuery);
